*{
    margin:0;
    padding:0;
    box-sizing:border-box;
}
body{
    font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
    background-color:#111827;
    color:#f3f4f6;
    line-height:1.6;
}
.container{
    width:100%;
    max-width:1200px;
    margin:0 auto;
    padding:0 16px;
}
a{
    text-decoration:none;
    color:inherit;
}
ul{
    list-style:none;
}
/* LOGO图片样式 */
.logo-img{
    height:40px;
    max-width:180px;
    width:auto;
    display:block;
    object-fit:contain;
}
.footer-logo-img{
    height:36px;
    max-width:160px;
    width:auto;
    display:block;
    object-fit:contain;
}
/* 头部导航 */
header{
    position:sticky;
    top:0;
    z-index:50;
    background-color:rgba(17,24,39,0.9);
    backdrop-filter:blur(8px);
    border-bottom:1px solid #374151;
}
.header-inner{
    display:flex;
    align-items:center;
    justify-content:space-between;
    padding:16px 0;
}
.logo-wrap{
    display:flex;
    align-items:center;
    gap:8px;
    flex-shrink:0;
}
.logo-text{
    font-size:20px;
    font-weight:bold;
}
.nav-list{
    display:flex;
    gap:32px;
    color:#d1d5db;
    align-items:center;
}
.nav-list a:hover{
    color:#f3f4f6;
    transition:color 0.2s;
}
/* PC端默认隐藏汉堡按钮 */
.menu-btn{
    display:none;
    background:transparent;
    border:none;
    color:#f3f4f6;
    font-size:24px;
    cursor:pointer;
    padding:6px 8px;
    line-height:1;
}
/* 移动端下拉菜单 */
.mobile-nav{
    display:none;
    background-color:rgba(17,24,39,0.98);
    backdrop-filter:blur(8px);
    border-bottom:1px solid #374151;
}
.mobile-nav.active{
    display:block;
}
.mobile-nav a{
    display:block;
    padding:14px 0;
    color:#d1d5db;
    border-bottom:1px solid #1f2937;
}
.mobile-nav a:last-child{
    border-bottom:none;
}
.mobile-nav a:hover{
    color:#f3f4f6;
}
/* Hero首页产品区域 */
#home{
    padding:64px 0;
}
.hero-row{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:40px;
    align-items:center;
}
.hero-title{
    font-size:clamp(2rem,5vw,3.5rem);
    line-height:1.2;
    font-weight:bold;
}
.hero-desc{
    margin-top:24px;
    color:#9ca3af;
    font-size:18px;
}
.hero-buttons{
    margin-top:32px;
    display:flex;
    flex-wrap:wrap;
    gap:16px;
}
.btn-primary{
    padding:12px 28px;
    background-color:#2563eb;
    border-radius:8px;
    font-weight:500;
    transition:background 0.2s;
}
.btn-primary:hover{
    background-color:#3b5172;
}
.btn-outline{
    padding:12px 28px;
    border:1px solid #4b5563;
    border-radius:8px;
    font-weight:500;
    transition:border-color 0.2s;
}
.btn-outline:hover{
    border-color:#9ca3af;
}
.tip-text{
    margin-top:24px;
    color:#6b7280;
    font-size:14px;
}
.img-wrap{
    background-color:#1f2937;
    padding:16px;
    border-radius:12px;
    overflow:hidden;
}
.img-wrap img{
    width:100%;
    border-radius:8px;
    display:block;
}
/* 统计板块 */
#stats{
    padding:64px 0;
    background-color:#1f2937;
}
.section-head{
    text-align:center;
    margin-bottom:48px;
}
.section-head h2{
    font-size:30px;
    font-weight:bold;
}
.section-head p{
    margin-top:8px;
    color:#9ca3af;
}
.stats-grid{
    display:grid;
    grid-template-columns:repeat(4,1fr);
    gap:24px;
}
.stat-card{
    background-color:#111827;
    padding:24px;
    border-radius:12px;
    text-align:center;
    transition:all 0.25s ease;
}
.stat-card:hover{
    transform:translateY(-4px);
    box-shadow:0 10px 25px -5px rgba(75, 85, 99,0.2);
}
.stat-num{
    font-size:36px;
    font-weight:bold;
    color:#94a3b8;
}
.stat-label{
    margin-top:8px;
    color:#9ca3af;
}
/* 功能特性 */
#features{
    padding:64px 0;
}
.features-grid{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:24px;
}
.feature-card{
    background-color:#1f2937;
    padding:24px;
    border-radius:12px;
    transition:all 0.25s ease;
}
.feature-card:hover{
    transform:translateY(-4px);
    box-shadow:0 10px 25px -5px rgba(75, 85, 99,0.2);
}
.feature-icon{
    width:48px;
    height:48px;
    border-radius:8px;
    background-color:rgba(75, 85, 99,0.2);
    display:flex;
    align-items:center;
    justify-content:center;
    color:#94a3b8;
    font-size:20px;
    margin-bottom:16px;
}
.feature-card h3{
    font-size:20px;
    font-weight:600;
}
.feature-card p{
    margin-top:8px;
    color:#9ca3af;
}
/* 文章列表 */
#articles{
    padding:64px 0;
    background-color:#1f2937;
}
.article-grid{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:24px;
}
.article-card{
    background-color:#111827;
    border-radius:12px;
    overflow:hidden;
    transition:all 0.25s ease;
}
.article-card:hover{
    transform:translateY(-4px);
    box-shadow:0 10px 25px -5px rgba(75, 85, 99,0.2);
}
.article-card img{
    width:100%;
    height:176px;
    object-fit:cover;
    display:block;
}
.article-body{
    padding:20px;
}
.article-date{
    font-size:14px;
    color:#6b7280;
}
.article-card h3{
    font-size:18px;
    margin-top:4px;
}
.article-desc{
    font-size:14px;
    color:#9ca3af;
    margin-top:8px;
    display:-webkit-box;
    -webkit-line-clamp:2;
    -webkit-box-orient:vertical;
    overflow:hidden;
}
.more-wrap{
    text-align:center;
    margin-top:40px;
}
.more-link{
    color:#94a3b8;
}
.more-link:hover{
    text-decoration:underline;
}
/* 页脚 */
footer{
    padding:48px 0;
    border-top:1px solid #374151;
}
.footer-grid{
    display:grid;
    grid-template-columns:repeat(4,1fr);
    gap:32px;
}
.footer-logo-desc{
    margin-top:12px;
    color:#9ca3af;
    font-size:14px;
}
.footer-col h4{
    font-weight:600;
    margin-bottom:16px;
}
.footer-col li{
    margin:8px 0;
}
.footer-col a{
    color:#9ca3af;
    font-size:14px;
}
.footer-col a:hover{
    color:#f3f4f6;
}
.copyright{
    margin-top:40px;
    padding-top:24px;
    border-top:1px solid #374151;
    text-align:center;
    color:#6b7280;
    font-size:14px;
}
/* 移动端适配 */
@media(max-width:768px){
    .nav-list{
        display:none;
    }
    .menu-btn{
        display:inline-flex;
        align-items:center;
        justify-content:center;
    }
    .hero-row{
        grid-template-columns:1fr;
    }
    .stats-grid{
        grid-template-columns:repeat(2,1fr);
    }
    .features-grid{
        grid-template-columns:1fr;
    }
    .article-grid{
        grid-template-columns:1fr;
    }
    .footer-grid{
        grid-template-columns:1fr;
        gap:24px;
    }
    .logo-img{
        max-width:140px;
    }
    .footer-logo-img{
        max-width:120px;
    }
}